Multipathway risk assessment of trihalomethane exposure in drinking water of Lebanon | Zendy

Lucy Semerjian | Zendy; John Ojur Dennis | Zendy

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Multipathway risk assessment of trihalomethane exposure in drinking water of Lebanon

Author(s) -

Lucy Semerjian,

John Ojur Dennis

Publication year - 2007

Publication title -

journal of water and health

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.482

H-Index - 59

eISSN - 1996-7829

pISSN - 1477-8920

DOI - 10.2166/wh.2007.046

Subject(s) - trihalomethane , ingestion , risk assessment , environmental health , population , toxicology , bromoform , tap water , environmental science , environmental chemistry , medicine , water treatment , chemistry , environmental engineering , chloroform , biology , computer security , chromatography , computer science

The toxicological risks and lifetime cancer risks of trihalomethanes through oral ingestion, dermal absorption, and inhalation exposure from tap water in selected regions in Lebanon are estimated. Existing trihalomethane concentrations do not pose any non-carcinogenic and developmental risks in the exposed population via oral ingestion. Among the three pathways, residents have a higher risk of cancer through oral ingestion than through the other two pathways. The lifetime cancer risk through oral ingestion for dibromochloromethane makes the highest contribution to total risks, followed by bromodichloromethane, bromoform, and chloroform. The total multipathway cancer risk analysis suggests that no cancer risks exist during the summer and winter seasons; however, in the spring the total cancer risks exceeds the USEPA acceptable level of 10(-6) by a factor of 10.7.

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